Earthquake Analysis
Causing substantial disaster to densely populated area more and more frequently, DIANA is proud to contribute to the safety of modern and historical structures with its powerful range of analysis functionalities.
Reliable simulation for earthquake impact
Ensuring new and existing architecture withstands the most severe consequences
Contemporary structures, in earthquake sensitive areas, are designed to sustain earthquakes without danger of damage or collapse. DIANA provides you with the capability to not only design modern structures to modern codes, but to also assess older structures so that they can be brought up to contemporary standards.
Comprehensive solutions for seismic and dynamic analysis
More than just earthquake analysis
For many non-standard, or altered over time structures, an earthquake design or assessment requires dynamic finite element analysis.
DIANA offers solutions for both simple linear dynamic analysis, and full nonlinear dynamic analysis – taking into account the loading history of the structure. With their enormous power, earthquakes are often accompanied by water impacts resulting from tsunamis, collapse of neighboring structures, liquefaction of the ground, or fire. This is where DIANA’s powerful solvers come into play – allow you to carry out a whole range of different analysis types in one command.
Dedicated features for earthquake analysis
- Linear transient analysis with different time integration schemes
- Direct frequency response analysis
- Modal response analysis
- Spectral response analysis
- Nonlinear transient analysis with different time integration schemes
- Hybrid frequency-time domain analysis
- Pushover load & pushover analysis
All dynamic analysis procedures can be used in combination with fluid-structure interaction effects. At a fluid-structure interface a full coupled acceleration-pressure matrix is calculated for normal displacements on the interface. This interaction matrix accounts for effect of fluid dynamics to the structure in the structural analysis. Frequency dependent effects, e.g. fluid compressibility and boundary damping, can be defined with a range of analysis types.
All structural element types can be used in all available dynamic analysis procedures
- Mass density per unit volume
- Reduced mass density for dead weight correction
- Distributed mass elements with damping properties for defining non-reflection boundaries
- Consistent and lumped concentrated translational masses and rotational inertia
- Viscous or Rayleigh damping
- Structural or hysteretic damping
- Continuous damping via discrete spring/dashpot elements
- Base excitations, single and multi-directional
- Prescribed nodal accelerations (2011) and displacements
- Time-load diagrams, e.g. accelerograms
- Frequency-load diagrams, e.g. spectra
- Specified initial displacement and/or velocity fields
- Initial stresses
- Possibility to add stress-stiffness to linear elastic stiffness matrix in frequency analysis
- For direct Frequency Response output of complex results and/or amplitude-phase results
- Lanczos Eigensolver with various decomposition techniques, shifting option, and automatic ordering
- Spectral Response with ABS, SRSS, and CQC output
- Euler backward, Newmark, Wilson-theta, Hilber-Hughes-Taylor, and Runge-Kutta time-integration
- Total-strain cracking models
- Modified Maekawa-Fukuura concrete model ( Multi-Axial Damage and Cracked Concrete models)
- Monti-Nuti-steel model
- Modified 2-surface steel model
- Hardin-Drnevich and Ramberg-Osgood simple soil models
- UBC, Bowl, Nishi and Towhata-Iai liquefaction models
- Engineering liquefaction analysis
Licensing packages
Choose your subscription
We provide a wide range of flexible licensing modules and subscription plans for advanced calculations. Our Sales Team are always more than happy to discuss your requirements and can make individualized proposals based on your specific needs.
